02/25/2026 updated
100 % available
System Administrator | Security Analyst
Bangkok, Thailand
Only remote
Master of Computer ScienceAbout me
System administrator with 2 years of practical experience supporting hybrid IT environments (Windows/Linux). Proficient in deploying and maintaining servers, automating routine tasks, managing accounts and access rights, configuring network services, and diagnosing network issues.
Controles de AccesoActive DirectoryAutomationBash ShellUbuntu (Operating System)CompTIA Security+Computer SecurityDebian LinuxLinuxIncident ResponsePython (Programming Language)Network ServiceNGINXServer AdministrationSecurity Systems
System administrator with 2 years of practical experience supporting hybrid IT environments (Windows/Linux) in both remote and on-site settings. Proficient in deploying and maintaining servers, automating routine tasks, managing accounts and access rights, configuring network services, and diagnosing network issues. Participated in Level 1 information security incident response, conducted basic security audits, and configured security systems. Actively deepening knowledge in cybersecurity through personal labs and preparation for industry certifications (TryHackMe Blue Team, CompTIA Security+/CySA+).
Experience
Professional experience0 - 5 years
Freelancer since2026
Languages
ChineseGoodEnglishFluentRussianNative speaker
Project history
Achieved 99.8% uptime for critical services (file sharing, domain controllers) through proactive maintenance of 30+ hybrid servers (Linux/Windows) and Docker containers, reducing incidents caused by hardware and configuration failures by 40% over 12 months.
Saved 180+ hours annually for the team by automating 12 routine operations (account management, log rotation,backup validation) through a unified Bash/PowerShell framework with self-documentation and failure alerting.
Configured a segmented network with zone isolation (DMZ, app, DB) and site-to-site VPN for remote access, protecting critical assets from unauthorized access from adjacent network segments.
Developed and tested backup/recovery scripts through specialized custom scripts.
Identified and remediated 3 critical vulnerabilities (including a hidden traffic backdoor) by conducting detailed analysis of network dumps using tcpdump/Wireshark during traffic anomaly investigations between security zones.
Built a unified observability system using Zabbix + Grafana: configured 200+ triggers and dashboards, reducing average incident detection time (MTTD) from 45 minutes to 7 minutes.
Certificates
Security+ (scheduled for 2026)
CompTIA2026
Security Analyst Level 1 (scheduled for 2026)
TryHackMe2026